Roger, an easy (and cheap way) might be CB crystals. Most are 3rd overtone in the range of 26965-27405kHz (= 8988-9135kHz xtal frequency). Divided by 1024 (eg. using a 74HC4060 as oscillator / divide
Roger, an easy (and cheap way) might be CB crystals. Most are 3rd overtone in the range of 26965-27405kHz (= 8988-9135kHz xtal frequency). Divided by 1024 (eg. using a 74HC4060 as oscillator / div
Use a programmable divider for more obscure division ratios. September's RadCom has a generic design for 74HC161 type Andy www.g4jnt.com On 26 October 2010 19:16, Roger Lapthorn <rogerlapthorn@gma